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Phys Rev E Stat Nonlin Soft Matter Phys. 2008 Aug;78(2 Pt 2):025204. Epub 2008 Aug 19.

Phase synchronization in mutually coupled chaotic diode lasers.

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  • 1Jack and Pearl Resnick Institute for Advanced Technology, Department of Physics, Bar-Ilan University, Ramat-Gan 52900, Israel.


Semiconductor lasers with optical feedback have chaotically pulsating output behavior. When two similar chaotic lasers are optically coupled, they can become synchronized in their optical fluctuations. Here we show that the synchronization is not only in the amplitude and in the timing of the pulses but that the short pulses are also phase coherent with each other. This is true even when the lasers are separated by distances much larger than their coherence length.

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